Gemstone



FIG. 1 is a top view of an exemplary gemstone;

FIG. 2 is a bottom view of the exemplary gemstone;

FIG. 3 is a first front, rear, left and right view of the exemplary gemstone;

FIG. 4 is a second front, rear, left and right view of the exemplary gemstone; and,

FIG. 5 is a upper perspective view of the exemplary gemstone. 

The ornamental design for a gemstone, as shown and described. 